Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model
As the most recent warm period in Earth's history with a sea-level stand higher than present, the Last Interglacial (LIG, ∼130 to 115kyrgBP) is often considered a prime example to study the impact of a warmer climate on the two polar ice sheets remaining today. Here we simulate the Last Intergl...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/345080 2023-07-23T04:14:53+02:00 Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model Goelzer, Heiko Huybrechts, Philippe Marie-France, Loutre Fichefet, Thierry Sub Dynamics Meteorology Marine and Atmospheric Research 2016-12-15 image/pdf https://dspace.library.uu.nl/handle/1874/345080 en eng 1814-9324 https://dspace.library.uu.nl/handle/1874/345080 info:eu-repo/semantics/OpenAccess Global and Planetary Change Stratigraphy Palaeontology Article 2016 ftunivutrecht 2023-07-02T01:58:42Z As the most recent warm period in Earth's history with a sea-level stand higher than present, the Last Interglacial (LIG, ∼130 to 115kyrgBP) is often considered a prime example to study the impact of a warmer climate on the two polar ice sheets remaining today. Here we simulate the Last Interglacial climate, ice sheet, and sea-level evolution with the Earth system model of intermediate complexity LOVECLIM v.1.3, which includes dynamic and fully coupled components representing the atmosphere, the ocean and sea ice, the terrestrial biosphere, and the Greenland and Antarctic ice sheets. In this setup, sea-level evolution and climate-ice sheet interactions are modelled in a consistent framework. Surface mass balance change governed by changes in surface meltwater runoff is the dominant forcing for the Greenland ice sheet, which shows a peak sea-level contribution of 1.4m at 123kyrgBP in the reference experiment. Our results indicate that ice sheet-climate feedbacks play an important role to amplify climate and sea-level changes in the Northern Hemisphere. The sensitivity of the Greenland ice sheet to surface temperature changes considerably increases when interactive albedo changes are considered. Southern Hemisphere polar and sub-polar ocean warming is limited throughout the Last Interglacial, and surface and sub-shelf melting exerts only a minor control on the Antarctic sea-level contribution with a peak of 4.4m at 125kyrBP. Retreat of the Antarctic ice sheet at the onset of the LIG is mainly forced by rising sea level and to a lesser extent by reduced ice shelf viscosity as the surface temperature increases. Global sea level shows a peak of 5.3m at 124.5kyrBP, which includes a minor contribution of 0.35m from oceanic thermal expansion. Neither the individual contributions nor the total modelled sea-level stand show fast multi-millennial timescale variations as indicated by some reconstructions. Article in Journal/Newspaper Antarc* Antarctic Greenland Ice Sheet Ice Shelf Sea ice Utrecht University Repository Antarctic Greenland The Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Global and Planetary Change Stratigraphy Palaeontology |
spellingShingle |
Global and Planetary Change Stratigraphy Palaeontology Goelzer, Heiko Huybrechts, Philippe Marie-France, Loutre Fichefet, Thierry Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model |
topic_facet |
Global and Planetary Change Stratigraphy Palaeontology |
description |
As the most recent warm period in Earth's history with a sea-level stand higher than present, the Last Interglacial (LIG, ∼130 to 115kyrgBP) is often considered a prime example to study the impact of a warmer climate on the two polar ice sheets remaining today. Here we simulate the Last Interglacial climate, ice sheet, and sea-level evolution with the Earth system model of intermediate complexity LOVECLIM v.1.3, which includes dynamic and fully coupled components representing the atmosphere, the ocean and sea ice, the terrestrial biosphere, and the Greenland and Antarctic ice sheets. In this setup, sea-level evolution and climate-ice sheet interactions are modelled in a consistent framework. Surface mass balance change governed by changes in surface meltwater runoff is the dominant forcing for the Greenland ice sheet, which shows a peak sea-level contribution of 1.4m at 123kyrgBP in the reference experiment. Our results indicate that ice sheet-climate feedbacks play an important role to amplify climate and sea-level changes in the Northern Hemisphere. The sensitivity of the Greenland ice sheet to surface temperature changes considerably increases when interactive albedo changes are considered. Southern Hemisphere polar and sub-polar ocean warming is limited throughout the Last Interglacial, and surface and sub-shelf melting exerts only a minor control on the Antarctic sea-level contribution with a peak of 4.4m at 125kyrBP. Retreat of the Antarctic ice sheet at the onset of the LIG is mainly forced by rising sea level and to a lesser extent by reduced ice shelf viscosity as the surface temperature increases. Global sea level shows a peak of 5.3m at 124.5kyrBP, which includes a minor contribution of 0.35m from oceanic thermal expansion. Neither the individual contributions nor the total modelled sea-level stand show fast multi-millennial timescale variations as indicated by some reconstructions. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Goelzer, Heiko Huybrechts, Philippe Marie-France, Loutre Fichefet, Thierry |
author_facet |
Goelzer, Heiko Huybrechts, Philippe Marie-France, Loutre Fichefet, Thierry |
author_sort |
Goelzer, Heiko |
title |
Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model |
title_short |
Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model |
title_full |
Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model |
title_fullStr |
Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model |
title_full_unstemmed |
Last Interglacial climate and sea-level evolution from a coupled ice sheet-climate model |
title_sort |
last interglacial climate and sea-level evolution from a coupled ice sheet-climate model |
publishDate |
2016 |
url |
https://dspace.library.uu.nl/handle/1874/345080 |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Greenland Ice Sheet Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet Ice Shelf Sea ice |
op_relation |
1814-9324 https://dspace.library.uu.nl/handle/1874/345080 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772188096706641920 |